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Date: Wed, 27 Oct 2010 22:45:03 +0800 From: tom.leiming@...il.com To: netdev@...r.kernel.org, oliver@...kum.org, davem@...emloft.net Cc: Ming Lei <tom.leiming@...il.com>, David Brownell <dbrownell@...rs.sourceforge.net>, Greg Kroah-Hartman <gregkh@...e.de>, Ben Hutchings <ben@...adent.org.uk>, Joe Perches <joe@...ches.com>, Andy Shevchenko <andy.shevchenko@...il.com>, stable@...nel.org Subject: [PATCH] usbnet: runtime pm: fix usb_autopm_get_interface failure From: Ming Lei <tom.leiming@...il.com> Since usbnet already took usb runtime pm, we have to enable runtime pm for usb interface of usbnet, otherwise usb_autopm_get_interface may return failure and cause 'ifconfig usb0 up' failed if USB_SUSPEND(RUNTIME_PM) is enabled. Cc: David Brownell <dbrownell@...rs.sourceforge.net> Cc: Greg Kroah-Hartman <gregkh@...e.de> Cc: "David S. Miller" <davem@...emloft.net> Cc: Ben Hutchings <ben@...adent.org.uk> Cc: Joe Perches <joe@...ches.com> Cc: Oliver Neukum <oliver@...kum.org> Cc: Andy Shevchenko <andy.shevchenko@...il.com> Cc: stable@...nel.org Signed-off-by: Ming Lei <tom.leiming@...il.com> --- drivers/net/usb/usbnet.c | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-) diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index ca7fc9d..765308f 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -1273,6 +1273,16 @@ usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod) struct usb_device *xdev; int status; const char *name; + struct usb_driver *driver = to_usb_driver(udev->dev.driver); + + /*usbnet already took usb runtime pm, so have to enable the feature + * for usb interface, otherwise usb_autopm_get_interface may return + * failure if USB_SUSPEND(RUNTIME_PM) is enabled. + * */ + if (!driver->supports_autosuspend) { + driver->supports_autosuspend = 1; + pm_runtime_enable(&udev->dev); + } name = udev->dev.driver->name; info = (struct driver_info *) prod->driver_info; -- 1.7.3 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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